Plastic composition for plastering walls.



-- UNITED STATES PATENT OFFICE.

VVESLY G. THATOHER, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO JAMES V. R. FERRIS, OF NEW YORK, N. Y.

PLASTIC COMPOSITION FOR PLASTERING WALLS.

SPECIFICATION forming part of Letters Patent No. 659.942, dated October 16, 1900.

Application filed May 29, 1899. Renewed March 7, 1900. Serial No- 7,748. (No specimens.)

To all whom it may concern: portions at the time of compounding the ele- Be it known that I, WESLY G. THATCHER, a ments for ordinary uses; but it is frequently citizen of the United States, and a resident of desirable to retard the setting for a greater No. 310 West Eighteenth street, Buflalo, in length of time, and this can be done by add 40 the county of Erie and State of New York, ing more salt or bran, or both, before supplyhave invented certain new and useful Iming the composition. provements in Plastic Compounds, of which This compound is designed to be shipped in the following is a specification. a dry state, so that it can be handled in bags,

The object of the present invention is to instead of being converted into a plastic con- 5 provide a plastic composition to be used for dition at the factory. Thus the user can mix plastering walls, ceilings, &c., and also adaptit up as is desired for use, assuring the best ed for exterior work, such as roofing and coatquality of work in its application. ing of structures or for other like purposes; It is obvious that the proportions of cement and it consists of certain proportions of either and plaster-of-paris may be slightly varied for 50 wood or paper pulp, cement, plaster-of-paris, the work required. Thus for outside work, salt, and wheat-bran so combined as to form where hardness is a desideratum and color is a substance available for the particular use not essential, more cement maybe used; but required, as will now be set forth in detail. for interior workagreater proportion of plas- In general I find the best proportion, by volter-of-paris can be used, thus assuringapure- 55 2o. ume, of ingredients to be as follows% white color.

eleven parts- Po ent thirteen'par s; This compound makes a fine surface, is plaster-0:12am, twenty-six parts aw? vaeasily finished and durable, will resist the acr1a e, rom t ree to six parts, an sa t rom tion of heat, is impervious to moisture, and is two to four parts. In preparing an comadapted for pipe-covering or for other uses 60 pounding these elements I first thoroughly when acids are employed. grind and mix the cement and plaster-of- What I claim as new isparis, and this is then intermingled with the A plastic composition, composed of p u lp, dmpulp, andafterward the bra n and salt are c meut, plaster-of-paris s al t and wheat-flap, fully incorporated. The salt and bran are in t e proportions substantially as set forth. 5 used as retarders, owing to their tendency to Signed at New York, in the county of New retain moisture. Without these elements the York and State of New York, this 4th day of admixture after being rendered plastic with February, A. D. 1899.

water would set and dry rapidly, so that it is WESLY G. THATCHER. necessary to retard the hardening process. Witnesses: 3 5 Usually the quantity of saltand bran required ROLLAND THOMPSON,

for this purpose can be added in proper pro- SAM W. ADAMS. 

